I actually have seen one that you stand on top of, trying to remember if it was called the hooker or something along those lines, pulled behind the machine like a velke or similar objects. Had short tine hubs with a curved tine...anyone else seen this? lol

To my knowlege one that will do a decent job has yet to be developed yet. Most walk behinds do not have the drive train or power to pull an aerator. It takes a tractor of 12 hp or more just to pull one and that does not include mowing.
Turfcobob

actually, most hydros would easily pull something along these lines and anyone who has pulled out one of their stuck riders with a wb recognizes this. The drum styles rarely have bigger than a 6 hp motor after all w/ many being 4.5's, so it's not really hp that's the issue, it's weight. With a deep, straight tine, overcoming that leverage with a light(what's a hydro run, 450 lbs or so?) machine that may lift the back (drive)tires from the the ground becomes the issue. Thi sis why I think they were making the claw shaped, hooked tine and I cannot remember for the life of me exactly what it's called, esp. after reading the comments on the hooker front spikers elsewhere in this section.

Yer right HP is not the issue...it is what is between the hp and the ground that is the problem...smaller engine smaller drive line...usually belts..We are not talking a self propelled aerator here. He is asking about towing one with a walk behind mower..

JRCO makes the hooker aerator, I think. One of several attachments that attach to their tool carrier. I have their tine rake and it works very well. I haven't tried the aerator, but after running around behind a Bluebird yesterday, I might look into one.